Main Title |
Modeling Chlorine Residuals in Drinking-Water Distribution Systems. |
Author |
Rossman, L. A. ;
Clark, R. M. ;
Grayman, W. M. ;
|
CORP Author |
Environmental Protection Agency, Cincinnati, OH. Drinking Water Research Div. |
Publisher |
1994 |
Year Published |
1994 |
Report Number |
EPA/600/J-94/379; |
Stock Number |
PB95-125530 |
Additional Subjects |
Potable water ;
Distribution systems ;
Water distribution ;
Chlorine ;
Computerized simulation ;
Water pollution abatement ;
Reprints ;
Disinfection ;
Microbial degradation ;
Reaction kinetics ;
Water quality management ;
Mass transfer ;
EPANET computer program
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB95-125530 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
22p |
Abstract |
A mass transfer-based model is developed for predicting chlorine decay in drinking water distribution networks. The model considers first order reactions of chlorine to occur both in the bulk flow and at the pipe wall. The overall rate of the wall reaction is a function of the rate of mass transfer of chlorine to the wall and is therefore dependent on pipe geometry and flow regime. The model can thus explain field observations that show higher chlorine decay rates associated with smaller pipe sizes and higher flow velocities. It has been incorporated into a computer program call EPANET that can perform dynamic water quality simulations on complex pipe networks. The model is applied to chlorine measurements taken at nine locations over a 53 hour period from a portion of the South Central Connecticut Regional Water Authority's service area. Good agreement with observed chlorine levels over a range of assumed wall decay constants is obtained at locations where the hydraulics are well-characterized. The model should prove to be a valuable tool for managing chlorine disinfection practices in drinking water distribution systems. |